Warp stop-motion for looms.



No. 645,9!2. Patented Mar. 20, I900.

A.- W. CLEMENT.

WARP STOP MOTION FOR LOOMS.

I (Appliation filed Dec. 22, 1899.)

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Patented Mar. 20, I900. A. W. CLEMENT. I

WARP STOP MOTION FOR LOOMS.

(Application filed Dec. 22, 1.899.)

2 SheetsfSheet 2.

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NrrE STATES ATENT rrrcn.

ALVAH CLEMENT, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPERCOMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 645,912, dated March20, 1900.

Application filed December 22, 1899. Serial No. 741,250. (No model.)

To all whom it may concern): I

Be it known that I, ALv'AH W. CLEMENT,

a citizen of the United States, residing at Hopedale, county ofWorcester, State of Massachusetts, have invented an Improvement in WarpStop-Motions for Looms, of which the following description, inconnection with the accompanying drawings, is a specification, likeletters and figures on the drawings rep-. resenting like parts.

This invention relates to warp-stop-motion mechanism of the type whereinnormally-inoperative detecting devices are made operative upon breakageor undue slackness of the warp-threads to effect the actuation ofsuitable stopping means; and the invention has for its object theproduction of novel and improved mechanism of the specified type, theVarious novel features being fully described in the specificationhereinafter and particularly pointed out in the claims.

Herein one practical embodiment of the invention is illustrated inconnection with a loom, as the most extended use of the invention willprobably be in connection with such apparatus; but the invention is notrestricted to such an application.

Figure 1 is a sectional view of a portion of a loom, taken from front toback, with one form of the novel stopmotion mechanism embodied therein.Fig. 2 is a partial front elevation thereof. Fig. 3 is an enlargedvertical sectional detail View on the line 00 m, Fig. 2, looking towardthe right. Fig. 4 is an enlarged rear elevation, partially broken out,of a portion of the stopping means to be described. Fig. 5 is asectional view thereof on the line so 00, Fig. 4, looking to the left;and Fig. 6 is an enlarged perspective detail of one of thefeeler-journals to be described.

One of the side frames A of a loom, the cam-shaft G, and theshipper-lever S, only a portion of the latter being shown asconstituting one part of the stopping means, may be of any well-known orusual construction, the shipper-lever being act upon by a knockoff arm3, fast on a rock-shaft 3 mounted on the loom-frame and actuated at theproper time by means to be described to release the 50 shipper-leverfrom its usual holding-notch.

.rest.

- The warp-stop-motion mechanism is herein shown as comprising twoseries of controllingdetectors (1, located between the sheddingmechanism and the whip-roll XV, said detectors being longitudinallyslotted, as at d, and provided each with a warp-receiving eye d Stands Aon the loom-frame have bolted thereto depending L-shaped brackets A towhich are secured transverse supportingbars d set on edge and extendedthrough the longitudinal slots of the detectors to sustain them whenfreed from controlof their warp-threads, the lower ends of the twoseries of detectors being herein shown as separated by a plate d forminga back stop or Two warp-rests, shown as bars to 10 Fig. 1, extend fromone to the other of the brackets A it being understood that while onlyone of such brackets is herein shown each loom side will support such abracket, the warp-rests 21/20 being located in front of and at the rearof the series of detectors, respectively, to sustain the warps as theypass to the shedding mechanism. Each bracket A is provided with atransverselyextended foot a, and in the present embodiment of theinvention said foot is shown as extended an equal distance in oppositedirec tions toward the front and back of the loom and provided withslotted guideways a, said guideways converging and being downwardlyinclined toward the lower ends of the detectors, as clearly shown inFigs. 1 and 3.

Each series of detectors is herein shown as provided withits respectivecooperating feeler 8 5 f, which may be conveniently formed of anangle-iron, the web of whichhas its edge toward the detectors toothed orserrated,as at f said fecler having attached to each of its ends ajournal member f (shown best in Fig. 6) and made polygonalincross-section to easily fit the guideway or guide a and to slide thereinback and forth. The extremity of each journal is reduced and rounded, asat f to receive a link f, the two links f at one side of the loom beingpivotally connected at their inner endswith two substantially oppositelyextended arms I) and 6, fast on a rock shaft b mounted in suitablebearings on the lower end of the bracket A it being noted that the toofeeler-guides a are located symmetrically with relation to saidrock-shaft. Obviously the oscillation of the rock-shaft will, throughthe arms Z) Z) and the connecting-links f, serve to vibrate the feelersf toward and away from each other and the lower ends of the series ofdetectors (1. It is preferable to thus connect the feelers with therock-shaft at each end to preserve proper alinement of the feelcrsduring their vibration. The path of a feeler in accordance with thisinvention is thus in a plane instead of in the arc of a circle and theplane path of movement is downward] y inclined toward the lower end ofthe detector, so that the liability of the detector slipping up whileunder pressure due to engagement with the feeler is obviated. I

The detectors herein shown are usually made of thin flat sheet metalwith rounded lower ends,and it sometimeshappens in warpstop deviceswherein the feeler moves in a circular are that the said feeler strikingon the rounded end of the detecter will push the latter up out of theway, so that the feeler will not operate promptly to stop the loom.

It will be manifest from the foregoing description and the drawings thatone feeler and a single series of detectors could be employed, ifdesired, the sliding movement of the feeler upon its straightsupporting-guides being precisely the same and the direction of itsaction upon a dropped detector being the same.

The warpthreads, as usual, pass through the eyes in the detectors, andwhile the threads are in normal conditionthat is to say, intact andproperly tautthe detectors will be maintained out of the path ofmovement of the feeler; but upon failure ofa warpthread or undueslackness thereof the detector controlled by such thread will move intooperative position to engage the feeler. Such engagement of the feeleris made operative to effect the stoppage of the loom by any suitablemechanism.

Herein is shown one convenient form of feeler-actuating mechanism. Thecam-shaft C of the loom has fast upon it a feeler-actuating-cam 0*,shown in Fig. 5 as having a double throw, so that the cam will operatetwice for every revolution of the cam-shaft, said cam being normallyengaged by toe 0, fast on a rock-shaft 0 mounted in a buntercarrier H.(See Figs. 4 and 5.) This bunter-carrier H is shown as a yoke having arigidly-attached arm h, pivotally connected at its lower end at h to anarm 8 on the rockshaft 3 and at its upper end hooked or curved, as at72. to embrace an annularly-grooved collar 20 on a cam-shaft O. Theyoke-like bunter-carrier II provides elongated bearings 71 71 for theshort rock-shaft c said rockshaft also having fast thereon the hunter,(shown as an arm 11 having a shoulder 7L5, which at times is adapted tobe engaged bya tappet-cam 0 fast on the cam-shaft O. The free end of thebunter IPis connected bylink lb with anarm If, fast on the rock-shaft bthe weight of the parts being sufficient to draw the feelers toward thedetectors on one stroke, while the camO will effect the oppositemovement, the link being connected eccentrically with the rock-shaft bythe said arm b. If now the inward movement of a feeler is arrested, asby engagement with a dropped detectorthat is, one in operativeposition-the bunter II will be held up in the position shown in Fig. 5,with the shoulder 7!, in the path of movement of the tappetcam 0 andthereby the bunter-carrier H and the link 7L will be moved to the left,viewing Fig. 5, or toward the rear of the loom, as shown in Fig. 1, andthe shaft 5 will be rocked to release the shipper-lever by the action ofthe knock-off arm 3, and the loom will be stopped. The hooked end 7L2 ofthe link h permits such longitudinal movement of the latter while guidedby the grooved collar 20.

The invention is not restricted to the precise construction andarrangement of parts herein shown and described, as the same may bemodified or rearranged without departing from the spirit and scope ofthe invention.

Having described my invention, what I claim as new, and desire to securebyLetters Patent, is

1. In warp-stop-motion mechanism, aseries of movable detectorsmaintainedinoperativc by normal warp-th reads, a cooperating feeler,fixed straight guides therefor downwardly inclined toward the lower endsof the detectors, means to normally slide the feeler back and forth uponthe guides, includingarock-shaft having an arm fast upon it, and a linkconnecting said arm and feeler, and stopping means operative by orthrough the feeler upon its engagement with a detector in operativeposition.

2. In warp-stop-motion mechanism, two series of movable detectorsmaintained inoperative by normal warp-threads, a cooperating feeler foreach series, fixedly-mounted plane supporting-guides for the ends of thefeelers, downwardly convergent and arranged at right angles to thelength of the feelers, means to reciprocate the feelers on their guides,including a rock-shaft having oppositely-extended arms, and linksconnecting the arms with the feelers, and stopping means operated by orthrough arrest of a feeler when engaged by a detector in operativeposition.

3. In a loom, a shipper-lever, a knock-off arm therefor, a series ofstop-motion detectors maintained inoperative by normal warpthrcads, acooperating feeler, fixed plane guides upon which the feeler slidestoward and from the detectors, an actuating rockshaft operativelyconnected with the feeler, to vibrate it, a rotatable shaft having afeeler actuating cam and a tappet-cam thereon, a bunter-carrieroperatively connected with the knock-off arm, a bunter pivotally mountedon the carrier and having a connected toe to beengaged by thefeeler-actuating cam, and In testimony whereof I have signed my a linkconnected. with the hunter and also name to this specification in thepresence of connected eccentrically with the rock-shaft, two subscribingWitnesses.

to move the feeler in one direction, arrest of ALVAH W. CLEMENT. thefeeler by a detector operating" to effect Witnesses: engagement of thehunter and tappet-cam, to GEORGE OTIS DRAPER,

thereby move the knock-01f arm. ERNEST W. WOOD.

